After my injectors were replaced, truck is much quieter and smoother, but seems a bit lacking in power. Advice from the shop that did the injectors, was to check my timing.
This engine is a PIA to access the injection pump. I found a
post and video here on mud and asked the local cruiser group if anyone had a VE pump timing tool and Ian (SNLC) offered me his.
Had to remove my external coolant heater lines and fuel supply line to get the tool installed. I just clamped off the lines with vice grips so I didn't lose any coolant or much fuel.
Also figured out if I got up on the radiator to turn the crank, I could see the gage dial at the same time. Initial timing check, the pump was at .94, a bit retarded.
Ended up have to modify a 12 mm wrench to get to the one bolt, Ian loaned me a SST wrench that works on a 1HD-T pump, but it was too long to fit in my engine bay.
I pulled my power steering reservoir off it's mount, removed my battery, and battery tray (loosened up and slid it forward) and the hardline vacuum mess that are mostly capped off (ended up removing these lines permanently) and was able to access the front bolts holding the pump. Was able to get to the two rear bolts (using an inspection mirror to find one) with just an extension. The second rear bolt is directly under the timing port. Had to remove the timing tool to get at it. Started to remove injection lines, but noticed the pump would move with them on, so I left them tight. Not sure how in the hell I was going to get them off anyway.
Installed the timing tool again and advanced the pump to 1.2
Returned Ian's tool and a six pack and scavenged a piece of 4mm vacuum line (90999-92004 for future reference) and removed/rerouted some vacuum lines as most were capped and I don't even know what this one device is for, maybe something to do with the power steering and/or A/C?
It's gone now, along with the hard lines that interfered with getting to the front injection pump bolts.
I thought about trying to pull the boost compensator cap and look inside there, but figured I'd just change one thing at a time...and I'm afraid the intake will have to come off to get to the 'top' right bolt. If I'd had it off before, I may be able to get it off with out pulling the intake, but as hard as the one screw was to loosen, I'd end up stripping an allen head trying to blindly get at that one. Maybe its accessible if I pull the intake grid heater, not sure.
Think If I go so far as to pull the intake, I'll just pull the whole pump and get it serviced. This
dynamic timing advance spacer was also recommended. So may have to look to see how hard it is to get that installed. Looks interesting in the dyno testing video on the site.
Took the truck for a short drive last night after I got it all together and it seems to have way more pep. Didn't go up any big hills, or long enough to check much, but initially, I think the timing advance was worth the trouble.
